Draft



Nu. 625,225. Patented may Ie, |899.

2 w. B. WARREN.

DRAFT APPLIANCE FDR LOCOMTIVE BUILERS.

(Application led Dec. 14, 1898.)

(No Model.)

TH: Nonms 51ans cn., wnorounanmsnmsmu. n. c.

' UNITED STATES PATENT OFFICE.

WILLIAM n. WARREN, or PEoRIA,'ILLINoIs.

DRAFT APPLIANCE FOR LCONIOTIVE-BOILERS.

SPECIFICATION forming part of Letters Patent No. 625,225, dated May 16, 1899.

l Application Sled December 14, 1898. Serial No. 699,246. (N model.)

To all whom t may concern:

Be it known that I, IVILLIAM B. I'VARREN, a citizen of the United States, residing at Peoria, in the county of Peoria and State of Illinois, have invented certain new and useful Improvements in Draft Appliances for Locomotive-Boilers, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification.

My-invention relates to a draft appliance for the boilers of locomotives in which I provide for the use of the exhaust'steam from the engine-cylinders in conjunction with a fresh-air inlet, whereby the steam and air are mixed in a chamber common to both to be directed from an outlet beneath the smokearch of the boiler across the latter to the smoke-stack. v l

My invention consists in features of novelty hereinafter fully described, and pointed out in the claims.

Figurel is a vertical longitudinal sectional View taken on the line I I, Fig. II, through the head end of a locomotive-boiler and my appliance. Fig. II is a View in front elevation of a boiler and my appliance shown applied thereto, the head end of the boilerbeing removed. Fig. III is a Vertical sectional view taken on the line III III, Fig. I. Fig. IV is an enlarged detail view of the air-inlet-valve yoke. Y

1 designates a boiler having a smoke-arch 1, and 2 a smoke-stack. 3 are the live-steam pipes that lead from the steam-space in said boiler to the engine-cylinders. (Not shown.)

4 designates a steam-pipe located inline with the smoke-stack and having within its interior two passage-ways 5, separated by a partition 6. These passage-ways 5 are in communication with the engine-cylinders by pipes, (not shown,) through which the exhauststeam from said cylinders may be conveyed to said passage-ways to be discharged into a single steam-chamber 7, located above the passage-ways 5 and common to both passage-ways. At the upper end of the steamchamber 7 is a nozzle 8.

9 designates a housing mounted upon the pipe 4 beneath the smoke-arch, so that its outlet does not intrude within the latter to obstruct the slnoke-arch, and containing a mixing-chamber 10. The mixing-chamber 10 surrounds the upper end of the pipe 4 and extends above the upper end of said'pipe to a nozzle 1l,that forms an outlet from said chamber.

12 designates a fresh-air-outlet pipe that has communication through the housing 9 to the mixing-chamber 10. This pipe 12 extends to the Wall of the boiler, Where it is connected to a valve-box 13, that provides communication from the pipe 12 to the exterior of the boiler. 14 designates a valve seated against the outer end of said valve-box 13 and adapted to swing in sliding contact with the end of said box. This'valve is supported by a yoke 15, one end of Awhich is swiveled in an ear 13 on the valve-box 13. This yoke is shown in detail in Fig. IV. In the center of the yoke 15 is an upright pin 16, on which the valve 14 is seated, said valve being held to its seat againstthe end of the valve-box 13 by a spring 17, that surrounds the pin 16. The yoke is formed with' a free ed 15a, that receives the attachment of a link 18. The valve 14 is adapted to. be manipulated by the engineer in the cab, and to provide for such manipulation I employ an operating-rod leading from vthe cab and connected to a crank-arm 19, (see Fig. IL) mounted on a rock-shaft 20. The

rocklshaft is supported in brackets 21 and extendsdownwardly, so that its lower end is approximately in line with the link 18, connected to the free end of the yoke 15. The lower end of the rock-shaft is provided with a crank-arm 22, that receives. the connection of the opposite end of said link, 18 from its end that is connected to the valve-holding yoke. It Will thus be observed that the valve may be readily controlled by the engineer while in his cab by operating the rod leading thereto to turn the crank-arm 19, and thereby rock the shaft 2O to throw the link 18 in either direction for the purpose of allowing the ingress of more or less fresh air past the valve 14 into the fresh-air pipe 12 and thence into the mixing-chamber 10.

The exhaust-steam from the engine-cylinders Iiows through the passage-Ways 5 into the chamber 7, passing into the mixing-chamber 10, and thereby creates a suction insaid Ioo mixing-chamber, drawing fresh air through the pipe 12 into said mixing-chamberv to be use of exhaust-steam alone when creating the same draft.

Having thus described my invention, the following is What I claim as new therein and desire to secure by Letters Patent:

l. In a draft appliance, the combination,

with a boiler having a smoke-arch, and a smoke-stack,of an exhaust-steam pi pe,a housing having its outlet located beneath the smoke-arch in line with the smoke-stack and containing a mixing-chamber into Which said steam-pipe is adapted to empty and a freshair-inlet pipe having communication with said mixing-chamber; substantially as described.

2. In a draft appliance, the combination, with a boiler7 having a smoke-arch, and a smoke-stack of an exhaust-steam pipe,a housing having its outlet located beneath the -smoke-arch and containing a mixing-chamber into which said steam-pipe is adapted to empty, a fresh-air-inlet pipe having communication with said mixing-chamber, and a valve arranged to control the entrance of air to said pipe; substantially as described.

3. In a draft appliance for locomotive-boilers, the combination, with a boiler, having a smoke-arch, and a smoke-stack; of an exhaust-steam pipe having communication With the engine-cylinders and containingasteamchamber, a housing having its outlet located beneath the smoke-arch and containing a mixing-chamber into which said steam-chamber is adapted to empty, a fresh-air-pipe having communication with said mixing-cham-V ber, and leading to the exterior of said boiler, a valve closing the entrance to said air-pipe, and means for operating said valve; substantially as described.

4. In a draft appliance for locomotive-boilers, the combination, With a boiler, havinga smoke-arch, and a smoke-stack; of an eX- haust-steam pipe having communication with the engine-cylinders, a nozzle at the end of said eXhaustpipe a mixingchamber into which said exhaust-pipe is adapted to empty, a nozzle located beneath the smoke-arch at the outlet of said mixing-chamber@ fresh-air pipe having communication with said mixing-chamber, a valve arranged to control the entrance of air into said air-pipe; substaners, the combination of an exhaust-steam pipe having communication with the engine-cylinders, a mixing-chamber into which said eX- haust-steam pipe is adapted to empty, said mixing-chamber being provided with an outlet-nozzle, a fresh-air pipe having communication With said mixing-chamber, and leading to the exterior of the boiler, a valve adapted to control the entrance of air into said air-pipe, a yoke supporting said valve, and a rock-shaft having connection with said yoke through means of which said valve may be operated; substantially as described.

WILLIAM B. WARREN- In presence of- JOHN SCHREIBER, W. L. VERMILLION. 

